Thule Motion XT Rooftop Cargo Carrier Best cargo box overall runner-up With the Motion XT Rooftop Cargo Carrier, Thule has also a contender for the best overall cargo box.

Hard sided cargo boxes protect your items from weather and are theft resistant, and must be mounted to existing rails or crossbars. Roof baskets are heavy-duty all-purpose carriers.

Our top recommendation is a heavy-duty cargo box from SportRack. The Vista XL is designed to fit on SportRack roof rack systems, as well as square, round, and most factory racks.